Clear and concise explanations
Difficult concepts are explained in simple terms
Illustrated with graphs and diagrams
Search for the words or phrases
Access the guide anytime, anywhere - at home, on the train, in the subway.
Use your down time to prepare for an exam.
Always have the guide available for a quick reference.

Table of Contents
Introduction: Overview | Basic definitions | Extending the definitions | Mnemonics | Pi | Radian
Trigonometric Function Definitions: Right triangle definitions | Unit-circle definitions
Trigonometric Identities: Notation | Periodicity, symmetry, and shifts | Linear combinations | Pythagorean identities | Angle sum and difference identities | Tangents of sums of finitely many terms | Sines and cosines of sums of infinitely many terms | Double-angle formulae | Triple-angle formulae | Multiple-angle formulae | Power-reduction formulae | Half-angle formulae | Product-to-sum identities | Ptolemy''s theorem | Sum-to-product identities | Other sums of trigonometric functions | Inverse trigonometric functions | Trigonometric conversions | Infinite product formula | Relation to the Complex Exponential Function | Identities without variables | Exponential Definitions
Inverse Trigonometric Function: Relationships among the inverse trigonometric functions | General solutions | Recommended method of calculation | Two argument variant of arctangent | Logarithmic forms
Trigonometric Function Applications: Computation | Exact Trigonometric Constants | Law of sines | Law of cosines | Law of tangents
Periodic Functions: General definition | Antiperiodic functions and other generalizations | Amplitude | Frequency | Wavelength | Sine wave
Polar coordinate system: Plotting points with polar coordinates | Converting between polar and Cartesian coordinates | Polar equations | Circle | Line | Polar rose | Archimedean spiral | Conic sections | Complex numbers | Three dimensions | Cylindrical coordinates | Spherical coordinates | Applications
Spherical Trigonometry: Lines on a sphere | Law of Cosines and Law of Sines | Central Angle
Great-circle Distance: The formula | Spherical distance on the Earth | Spherical coordinates | Haversine Formula

 less